15. d1c1  15... a7a6 [%c_arrow e2b5;keyPressed;none;from;e2;opacity;0.8;to;b5;persistent;false][%c_highlight b5;keyPressed;none;opacity;0.8;square;b5;persistent;false] Useful to prevent the white bishop from going to b5 in some lines. 16. c1g5 The queen clears the way for the rook to occupy the c-file, but as the game continues, it will be poorly-placed on the kingside. 16... d7f8 The knight will feel comfortable on e6. 17. f1c1 